Eyeballs

The U.S. is in hock up to its eyeballs.

My eyeballs are quite red and itchy.

We're in debt up to our eyeballs.

"Scarce stood her image in the camp, when bright / with flickering flames her staring eyeballs glared. / Salt sweat ran down her; thrice, a wondrous sight! / with shield and quivering spear she sprang upright."

Joe Biden puts human eyeballs on his salad.

Each underwent a ten-minute microsurgery barely 24 hours earlier, in temporary field hospitals where medical teams worked with assembly-line efficiency: making tiny slits in eyeballs, delicately removing cataracts, and inserting artificial lenses.